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@nitrh tetra intent @ffirri JOHN M. srnneno N, OF NEW; .YORK, N. Y.Letters Patent No. 71,663, dated December 3, 1867.

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TO ALL WHOM IT MAY CONCERN;

Be it known. that I, JOHN M. STURGEON, of the city,- county, and Stateof New York, have invented-a new and useful Sizing for Bank-Note Paper;and do hereby declare that the following is a full, clear, and'exactdescription thereof, which will enable others skilled in the 'art toprepare and use the some, viz:

This invention relates to the preparation of a sizing for bank-notepaper, national currency, bonds, bankbills, bills of exchange, andfractional currency, which will render them comparative'ly fire-proof,and absolutely proof against counterfeiting. I

p This sizing is prepared by combining the ingredients according-to thefollowing formula: Gum-dragon and albumen, equal parts; table-salt,suflicient 'for consistency; carbonate of soda, carbonate of potassa,silica,

dissolred, and the quantity reqnisite added.

The above combination renders the note perfectly and completely securefrom counterfeiting, from the fact that in its manipulation, out of thefive or six colors the note may contain, two will be left fugitive, sothat when a counterfeiter softens the note so prepared in an alkali,'which' he must do to get a perfect register,

the two fugitive colors will float ofi in solution, and areuncontrollable by him. X

Having thus described my invention, what I claim'and desire to secure byLetters Patent, is A sizing," made from the within formula,substantially as described, and combined for the purposes set forth. Intestimony whereof, I have hereunto set my hand and signature, I 4 JNO.M. STURGEON.

Witnesses:

FRANK S. TAFT, Amzo R. Down.

